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Washington University Experience | NEOPLASMS (GLIAL) | Ependymoma - Electron Microscopy | 3B1 Ependymoma, anaplastic (Case 3) EMA 1.jpg
3B1,2 The stain for epithelial membrane antigen (EMA) shows patchy immunoreactivity, including cytoplasmic dot-like positivity and membranous staining at the periphery of some of the clear cytoplasmic vacuoles in signet ring cells is also evident.
